Dongpo Formation


The Dongpo Formation is an Ediacaran aged geologic formation in the Henan Province of Central China. It is also fossiliferous in nature, containing fossils which date it to the Nama assemblage.

Geology

The Dongpo Formation can be found within the North China Craton, currently amongst the oldest known cratons in the world, alongside its southern edge. The formation itself is primarily composed of yellowish-green shale, siltstone, and fine-grained sandstone.
It is unconformably overlain by the sandstone Cambrian aged Xinji Formation, meanwhile it is conformably underlain by the older glacial Luoquan Formation.

Paleobiota

The formation is dominated by macroalgae forms, like Glomulus, alongside tubular forms such as Wutubus and Shaanxilithes. There are also some Ediacaran-type fossils, and some rare trace fossils, all of which has helped to constrain the age of the formation to the terminal Ediacaran, between and.

''incertae sedis''

GenusSpeciesNotesImages
Aspidella
  • Aspidella sp.
Discoidal fossil.
Horodyskia
  • Horodyskia sp.
  • Organism with the appearance of a string of beads.
    Palaeopascichnus
  • P. delicatus
  • P. linearis
  • Agglutinating palaeopascichnid organism.
    Orbisiana
  • Orbisiana sp.
  • Agglutinating palaeopascichnid organism.
    Vendotaenia
  • Vendotaenia sp.
  • Ribbon-like organism.
    Shaanxilithes
  • Shaanxilithes sp.
  • Tubular organism, regarded as either a junior synonym of Nenoxites, or a Cloudina-like fossil.
    Wutubus
  • Wutubus sp.
  • Tubular organism.

    Flora

    GenusSpeciesNotesImages
    Glomulus
    • Glomulus sp.
    Filamentous cyanobacteria.

    Microorganisms

    GenusSpeciesNotesImages
    Acanthomorphic acritarchs
    • ???
    Acritarchs.

    Ichnogenera

    GenusSpeciesNotesImages
    Archaeonassa
    • Archaeonassa sp.
    Burrows.

    Undescribed

    GenusSpeciesNotesImages
    Unnamed frondose fossils
    • ???
    Slender frondose fossils, which bear some similarities with petalonamids, although poor preservation makes proper taxonomic assignment difficult.